package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * ClassName:AutoFillAspect
 * Description:自定义切面
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill) ")
    public void autoFillPointCut() {
    }
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        // 获取当前被拦截的方法
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取方法签名
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);//获取方法上的注解对象
        OperationType operationType = annotation.value();//获得数据库操作类型
        Object[] args = joinPoint.getArgs();//获取方法参数
        if (args.length == 0 || args[0] == null){
            return;
        }
        Object arg =  args[0];
        //准备赋值的数据
        Long currentId = BaseContext.getCurrentId();
        LocalDateTime now = LocalDateTime.now();

        if (operationType == OperationType.INSERT){
            //设置创建时间和创建人
            try {
                Method setCreateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setCreateTime.invoke(arg,now);
                setCreateUser.invoke(arg,currentId);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            //设置更新时间和更新人
            try {
            Method setUpdateTime = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
            Method setUpdateUser = arg.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
